CN109911711B

CN109911711B - Yarn splicing device for textile machine

Info

Publication number: CN109911711B
Application number: CN201811516740.5A
Authority: CN
Inventors: S·斯查顿
Original assignee: Saurer Spinning Solutions & CoKg GmbH
Current assignee: Saurer Spinning Solutions & CoKg GmbH
Priority date: 2017-12-12
Filing date: 2018-12-12
Publication date: 2020-09-29
Anticipated expiration: 2038-12-12
Also published as: JP7222686B2; CN109911711A; JP2019104632A; DE102017129582A1

Abstract

The invention relates to a yarn splicing device for a textile machine, comprising a splicing prism with a splicing channel capable of applying air pressure and a yarn processing device arranged at a distance from the splicing prism, wherein the yarn processing device comprises a corresponding yarn clamping device for fixing upper and lower yarns and a yarn cutting device for cutting off the yarn ends of the upper and lower yarns. The yarn splicing device is designed as a rotary splicer with at least one control element which can control the yarn processing device. The carrying devices are arranged on both sides of the splicing channel, with a first support point for fixing one of the yarn cutting devices, which is arranged between the opening of the splicing channel and the outer edge of a support element, which surrounds the control element and the splicing prism. The carrier device is designed as a corner section or a circular section, having a first support surface section with a first support point for fixing the yarn cutting device and a second support surface section with a second support point for fixing the yarn clamping device, the first and second support surface sections being angled.

Description

Yarn splicing device for textile machine

Technical Field

The invention relates to a yarn splicing device for textile machines, in particular for workstations of automatic winding machines, having a splicing prism which comprises a splicing channel to which air pressure can be applied, and a yarn processing device which is arranged at a distance from the splicing prism and comprises respective yarn clamping devices for fixing an upper yarn and a lower yarn and respective yarn cutting devices for cutting the yarn ends of the upper yarn and the lower yarn to a length.

Background

Such pneumatically operated yarn splicing devices have long been known in the textile machine industry, in particular in connection with air-jet spinning machines and automatic winding machines, as described more thoroughly in document DE102024080a1 or in the applicant's manual "automatic winder 338".

With this yarn splicing device, two yarn ends can be wound pneumatically to form an knotless joint having practically the same strength as the yarn, ideally exactly the same appearance as the yarn. That is, if during the winding process a yarn break or a defined clearer cut occurs at one winding unit of the automatic winder, the yarn end of the individual yarn is first returned to the region of the yarn splicing device by means of a special pneumatic device.

The suction nozzle takes out the end of the thread, for example the so-called upper thread, from the cross-wound bobbin, threads the upper thread into a splicing channel of a splicing prism of a thread splicing device, above which a thread clamping device is arranged, below which a thread cutting device is positioned. Simultaneously or subsequently, the thread end of the so-called lower thread, which originates from the feed bobbin positioned in the winding position, is threaded into the splicing channel of the splicing prism by means of a vacuum-operated clamping tube, the thread clamping device being arranged below the splicing channel and the thread cutting device being arranged above the splicing channel. The yarn ends are then cut to length by a yarn cutting device and drawn into a so-called small hold-open tube where they are ready for a subsequent splicing operation. This means that in a small holding-open tube, before the yarn end is pulled back into the splicing channel by the yarn feeder, the yarn end first releases as much of the yarn twist at the yarn end as possible, so that the yarn ends rest adjacent to each other in the splicing channel with an indicated overlap, enabling the pneumatic pressure to finally spiral there. In order to be able to produce pneumatic yarn connections with practically the same strength as the yarn and almost exactly the same appearance as the yarn by means of such a yarn splicing device, it is advantageous if the yarn ends do not exceed a certain free yarn length after having been cut to length.

In the above-described yarn splicing devices, the yarn cutting device is therefore arranged as close as possible to the region of the outlet of the splicing channel of the splicing prism, or as described, for example, in DE4240728a1, in addition to an additional yarn cutting device being mounted directly in front of the outlet of the splicing channel.

These yarn splicing devices of the prior art which have proven themselves are used in particular in the case of workstations of automatic winding machines which have a yarn path which is as open as possible, i.e. in the case of automatic winding machines which can be accessed from the front by an operator.

However, in the context of textile machines which produce cross-wound bobbins, automatic winding machines are also known which have work stations, each of which has a so-called closed yarn guide channel.

For example, DE102010049515a1 describes a workstation of an automatic winding machine, which has a multipart yarn guide channel which closes the yarn path and has a receiving housing or a receiving section for various yarn monitoring and yarn processing devices.

The closed yarn guide channel extends between an unwinding bobbin positioned in an unwinding position, which is rotatably mounted in the winding device, and the winding device. If desired, the thread guide channel can be vacuum-treated in sections, so that a vacuum flow is present in the thread guide channel, the flow direction of which can be specified in a defined manner.

A receiving housing for a yarn splicing device is integrated into the yarn guide channel, a first suction air connection for sucking the lower yarn connected to the unwinding bobbin, a second suction air connection for sucking the upper yarn, which has traveled to the surface of the cross-wound bobbin, the first and second suction air connections being connected to the receiving housing.

However, depending on the very limited spatial conditions in the region of the accommodating housing of the closed yarn guide channel, it is often difficult to use the yarn splicing device, in particular to position the associated yarn processing device.

Therefore, yarn splicing devices have been developed which require less space and can therefore be placed relatively easily in the housing shell of the closed yarn guide channel.

For example, in the following publication DE102016115732, a yarn splicing device designed as a rotary splicer is described. The yarn splicing device has a splicing prism which is arranged on the air distribution element and has two rotationally mounted control elements which can be acted upon in a defined manner by a respective individual drive. The yarn processing devices, such as the yarn cutting device and the yarn clamping device, can be suitably controlled by means of control elements. However, the yarn processing devices are mounted on preferably linear fixing elements, which are each arranged at a longer distance from the splicing channel of the splicing prism, with the result that the yarn ends of the upper and lower yarns cut by the yarn cutting device before the splicing operation are still longer after cutting.

The rotary splicer also has a rotatably mounted yarn feeder which must first initiate a long rotary motion before each splicing operation to position the yarn end before cutting by the yarn cutting device so that the yarn end has an acceptable length.

Disclosure of Invention

Starting from the above-mentioned prior art, the problem addressed by the present invention is to develop a yarn splicing device which is designed such that the yarn ends of the upper and lower yarns have a particularly specifiable length directly after having been cut to a length by the yarn cutting device, which length allows a suitable yarn connection without additional measures having to be taken.

The problem is solved in that the yarn splicing device is designed as a rotary splicer with at least one control element which can suitably control the yarn handling device, in that the carrier devices are arranged on both sides of a splicing channel of the splicing prism, in that the carrier devices have a first support point for fixing one of the yarn cutting devices, the first support point being arranged between an opening of the splicing channel and an outer edge of the support element, which surrounds the control element and the splicing prism. Alternatively or additionally, the support device is designed as an angled section (angular section) or as a circular section with a first support surface section, which comprises a first support point for fastening the thread cutting device, and a second support surface section, which comprises a second support point for fastening the thread clamping device, the first support surface section being set at an angle to the second support surface section. In other words, a first plane comprising first support surface segments with first support points extends at an angle relative to a second plane comprising second support surface segments with second support points, whereby the intersection line and the angle α are formed in the intersection area of the first plane and the second plane. The carrier device can preferably have a one-piece or multi-part design. In the case of a multipart design, several parts of the carrying device are coupled to one another. In particular, according to a further preferred embodiment, several parts of the carrying device are coupled to each other at least by means of a common holding element (such as a support element). Furthermore, the support surface segments with the respective support points can preferably be arranged adjacent to each other, whereby an extremely compact design can be achieved. Furthermore, the carrying device can preferably be formed by a stamped element, which is particularly suitable for the design of the circular segment shape, in which case the support surface segments with the respective support points can be formed by the stamped areas. The carrier device can thus be produced very economically.

The design of the yarn splicing device according to the invention has the particular advantage that, owing to the design and arrangement of the carrying device, the yarn cutting device can be positioned very close in the region of the opening or outlet of the splicing channel of the splicing prism, so that the yarn ends of the upper and lower yarns produced by the yarn cutting device can be cut to a shorter, and in particular specifiable and thus optimized length. In other words, the yarn connections created not only have a high strength as is known from such yarn splicing devices, but are also characterized by an appearance that is identical or very similar to that of the unseatched yarn sections due to the short free yarn overhang achieved as a result of the advantageous positioning of the yarn cutting device.

The yarn splicing device designed as a rotary splicer can advantageously be used in the case of workstations equipped with an open yarn path, in particular in the case of workstations having a closed yarn guide channel. Such a rotary splicer can also be used in the case of textile machines having a yarn splicing device associated with a plurality of workstations or a yarn splicing device associated with only one workstation, such as air jet spinning machines.

The alternative or additional embodiment of the support device as a corner section or a round section allows the use of a relatively simple design and thus economical support device, by means of which the installation position for the thread cutting device and for the thread clamping device can be provided, which enables an optimized thread treatment. That is, the carrier device can be better adapted to the shape of the rotary splicer, the support surface sections of the carrier device each being positioned such that the yarn processing device can be arranged as close as possible in the region of the exit of the splicing channel of the splicing prism when the carrier device is mounted.

In an advantageous embodiment, the first support surface section is set at an angle α with respect to the second support surface section, the angle α being in the range of 110 ° to 160 °, more particularly in the range of 120 ° to 130 °. In other words, the support surface segments are set at such an angle to each other that complementary angles are formed, a first complementary angle defining the angle α being in the range 110 ° to 160 °, more particularly in the range 120 ° to 130 °, and an associated second complementary angle being in the range 70 ° to 20 °, more particularly in the range 60 ° to 50 °. This preferred angular range allows an extremely compact design of the rotary splicer, since the arrangement of the yarn processing devices relative to each other can thus be oriented substantially at the radius profile of the rotary splicer, and thus the yarn processing devices can be positioned as close as possible to the respective opening or the respective outlet of the splicing channel.

Advantageously, the yarn cutting device is mounted on one support surface section of the carrier device, while the yarn clamping device is mounted on the adjacent support surface. In this way, it is ensured that the yarn processing device is positioned in the region of the yarn path of the upper or lower yarn as functionally required, i.e. arranged such that the yarn ends to be joined can be properly pre-processed without problems if necessary.

In a further advantageous embodiment, the thread cutting device has a stationary cutting edge and a movably mounted cutting edge, to which a switching pin is connected, which can be acted on by a switching post (stud) of the control element. Furthermore, the yarn clamping device preferably has a stationary clamping jaw (clamping jaw) for fixing the yarn and a movably mounted clamping jaw, which is equipped with a further switching pin that can be acted on by a second switching column of the control element.

In other words, the rotary splicer has a control element which, in the region of the mounting position of the carrier device, has a first and a second switching column, respectively, the first switching column being used for actuating the thread cutting device and the second switching column being used for actuating the thread clamping device.

By means of the switching columns, the yarn cutting device and the switching pins of the yarn clamping device can always be controlled in a defined manner, so that the yarn end ready for the subsequent splicing operation can always be suitably fixed and suitably cut to a length.

Drawings

Further details of the invention are explained in more detail below on the basis of an embodiment example shown in the drawing.

In the drawings:

fig. 1 shows a schematic side view of a work station of an automatic winding machine, with a yarn splicing device designed according to the invention,

fig. 2 shows a front view of a yarn splicing device designed as a rotary splicer, with a yarn processing device arranged on a carrier device,

FIG. 3 shows a carrier device designed as a corner segment with a yarn cutting device and a yarn clamping device, according to an embodiment example, and

fig. 4 shows a carrier device designed as a circle segment according to a further embodiment example.

List of reference numerals

1 textile machine

2 working station

3 bobbin and empty bobbin transmission system

4 bobbin supply section

5 memory segment

6 transverse conveying section

7 bobbin returning section

8 conveying plate

9 bobbin

10 yarn splicing device

11 central control unit

12 suction nozzle

13 pivot axis

14 yarn guide drum

15 Cross-wound bobbin

16 machine bus

17 holding opening small pipe

18 air distribution element

19 carrying device

20 pivot axis

21 cross-wound bobbin conveying device

22 pivot axis

23 splice prism

24 winding device

25 grip tube

26 support element

26a outer edge of the support element

27 switching pin

28 bobbin creel

29 workstation computer

30 switching pin

31 upper yarn

32 lower yarn

33 workstation housing

34 first support surface section

34a first support point

35 splice channel

36 yarn cutting device

37 yarn clamping device

38 yarn feeder

39 single driver

40 Single driver

41 first control element

42 second control element

43 first switching column

44 second switching column

45 pinion

46 cutting edge

47 cutting edge

48 second bearing surface section

48a second support point

49 clamping jaw

50 clamping jaw

51 tooth

52 tooth

53 circle segment

54 corner section

AS unwinding position

R direction

In the A direction

Detailed Description

Fig. 1 shows a schematic side view of a workstation 2 of a textile machine (automatic winding machine 1 in the exemplary embodiment) for producing cross-wound bobbins.

As is known, such an automatic winder 1 has, between its end frames (not shown), a plurality of such identical work stations 2 arranged in rows adjacent to one another.

At the workstation 2, the unwound bobbins (such as the bobbins 9) produced on the ring spinning machine upstream of the production process are rewound into bulky cross-wound bobbins 15, after they have been completed, the bulky cross-wound bobbins 15 are transferred by means of an automatically operated service unit (not shown) to a cross-wound bobbin conveyor 21 of the machine length and are transported by means of the cross-wound bobbin conveyor 21 to a bobbin transfer device arranged at the machine end.

Such an automatic winding machine 1 generally also has a central control unit 11, the central control unit 11 being connected, for example, via a machine bus 16 to the workstation computers 29 of the individual workstations 2.

In the exemplary embodiment, the automatic winding machine 1 is also equipped with a logistics device in the form of a bobbin and empty bobbin transport system 3, of which only the bobbin supply section 4, the reversibly drivable storage section 5, one of the transverse transport sections (cross-transport lines) 6, designed as a winding unit, leading to the workstation 2, and the bobbin return section 7 are shown in fig. 1. The bobbins 9 and the empty bobbins vertically oriented on the conveyor plate 8 circulate in the bobbin and empty bobbin conveyor system 3.

The bobbins 9 transported via the bobbin supply section 4 and initially temporarily stored in the storage section 5 are rewound to the voluminous cross-wound bobbin 15 in an unwinding position AS, which is located in the region of the transverse transport section 6 at the level of the winding unit 2.

For this purpose, the single winding unit 2 is just as well known and therefore has only implicitly various means to ensure proper operation of said winding unit 2. The devices are, for example, a suction mouth 12, a clamping tube 25 and a yarn splicing device 10, the yarn splicing device 10 being designed in the present case as a rotary splicer.

By means of the suction nozzle 12, which is mounted so as to rotate to a limited extent about the pivot axis 13, the upper thread 31, which has already travelled onto the surface of the cross-wound bobbin 15, can be received and transferred to the thread splicing device 10 after a winding interruption.

The clamping tube 25, which can be rotated to a limited extent about the pivot axis 20, serves to process the lower thread 32 connected to the bobbin 9 after the winding has been interrupted, i.e. the clamping tube 25 likewise conveys the thread end of the lower thread 32 to the thread splicing device 10.

If the workstation 2 has an open yarn path or if the workstation 2 is equipped with a closed yarn guide channel, the yarn splicing device 10 designed as a rotary splicer is connected to the workstation housing 33 by means of corresponding holding devices and is set slightly set back with respect to the normal yarn course, the yarn splicing device 10 being positioned in a corresponding accommodating housing of the yarn guide channel.

As explained in more detail below, the yarn splicing device 10 has: a splice prism 23, the splice prism 23 having a splice channel 35, air pressure being applicable to the splice channel 35 for joining a yarn end of the upper yarn 31 to a yarn end of the lower yarn 32; holding the opening tubulet 17 for mechanically preparing the yarn ends of the upper yarn 31 and the lower yarn 32; yarn processing devices (such as

yarn clamping devices

37A, 37B); the

yarn cutting devices

36A, 36B are for appropriately cutting the yarn ends to a length; and a yarn feeder 38 for positioning the yarn end.

In the case of such a workstation 2, it is generally additionally equipped with further devices which are not shown in more detail in fig. 1, such as a thread tensioner, a clearer with an attached thread cutting device, a waxing device, a thread tension sensor and a lower thread sensor.

In the case of such a workstation 2, the winding of the cross-wound bobbin 15 takes place on the winding device 24, and furthermore the winding device 24 has a creel 28, the creel 28 being mounted for movement about the pivot axis 22 and having means for rotatably holding the bobbin of the cross-wound bobbin 15.

For example, the cross-wound bobbin 15, which is held freely rotatably in the creel 28 during the winding process, rests on the surface of the cross-wound bobbin 15 on the so-called yarn guide drum 14 and is driven by friction. Such a thread guide drum 14 has thread guide grooves in which the thread which has fallen during the winding process is guided such that it runs onto the winding bobbin in a cross-wound layer.

However, since such a guide drum is very expensive and, in addition, only "random-wound" winding-type cross-wound bobbins can be produced, a more economical, non-grooved bobbin drive roller can be used instead of a guide drum. In this case, the cross-wound bobbin is rotated by the bobbin drive roller during the winding process solely by friction; the traversing of the forward-running yarn is then carried out by means of a separate yarn traversing device. Such yarn traversing devices equipped with yarn guiding fingers have been known for a long time in various embodiments, which are described in detail in, for example, DE102004025519a1, DE19858548a1 or DE19820464a 1.

Fig. 2 shows a front view of the yarn splicing device 10 designed as a rotary splicer.

As shown, the yarn splicing device 10 is equipped with a splicing prism 23, the splicing prism 23 being arranged on the air distribution element 18 and having a splicing channel 35, the splicing channel 35 being loadable with compressed air in a defined manner. The air distribution element 18, which has a receiving opening for holding the opening tubule 17, is surrounded by at least two rotationally mounted

control elements

41, 42, the rotationally mounted

control elements

41, 42 being able to act in a defined manner by means of the

respective driver

39 or 40.

The

control elements

41, 42 in turn each have a

toothing

51 or 52, the

toothing

51 or 52 meshing with the pinion 45, the pinion 45 being arranged on the motor shaft of the respective associated drive 39 or 40. The

respective drive

39 or 40, which is designed for example as a stepping motor, is additionally connected by means of a control line to the workstation computer 29 of the workstation 2 in question and can be suitably controlled by the workstation computer 29.

The first control element 41 additionally has a first switching column 43 and a second switching column 44 for actuating the

yarn processing devices

36, 37 mounted in the region of the yarn splicing device 10. That is, for example, the first control element 41 is equipped with two first switching columns 43 and with two second switching columns 44, to each first switching column 43 one of the

thread cutting devices

36A or 36B is connected, by means of which two second switching columns 44 the respectively connected

thread clamping device

37A or 37B can be actuated.

As can be seen in particular in fig. 3, the

yarn cutting devices

36A, 36B are each equipped with a switching pin 27, a

yarn clamping device

37A, 37B each having a switching pin 30 is fixed to the carrier device 19, which is in turn arranged such that the

yarn processing device

36, 37 is positioned close to the region of the exit of the splicing channel 35 of the splicing prism 23 and can be suitably controlled by the switching

columns

43, 44 by means of the switching pins 27, 30.

In an alternative embodiment, i.e. if the yarn splicing device 10 is equipped with a cover element, by means of which the splicing prism 23 can be closed during the splicing operation, the first control element 41 can also have a further switching column (not shown). By means of this further switching column, the cover element of the spliced prism 23 can then be suitably controlled such that the splicing channel 35 of the spliced prism 23 is closed during the splicing operation.

The second control element 42 has a yarn feeder 38 which is designed and arranged such that the yarn ends of the upper and

lower yarns

31, 32 cut by the yarn cutting device 36 and prepared in the hold-open tubule 17 can be pulled out of the hold-open tubule 17 by the yarn feeder 38 and can be positioned in the splicing channel 35 of the splicing prism 23, suitably for the actual splicing operation.

As can be seen, the air distribution element 18 and the

control elements

41, 42 are arranged in a protected manner in a support element 26, for example a sleeve-like support element, as already explained above, the support element 26 being able to be fixed to the workstation housing 33 of the workstation 2 by means of a retaining device or being able to be positioned in a receiving housing of a closed yarn guide channel. The support element 26 surrounds the spliced prism 23 and the

control elements

41, 42 in a protective manner by means of the outer edge 26a of the support element 26, in particular the

control elements

41, 42 are also mounted in a freely movable or rotatable manner.

Fig. 3 shows a perspective view and a detail of the carrier device 19 designed as a corner section 54.

As can be seen, the carrier device 19 has two

support surface sections

34 and 48, which are arranged at an angle α to each other. The angle α lies in the range 110 ° to 160 °, preferably in the range 120 ° to 130 °.

The thread cutting device 36 is mounted on a first support point 34a on the first support surface section 34, while the adjacent second support surface section 48 supports the thread clamping device 37 at a second support point 48 a.

As is known per se, the yarn cutting device 36 has a stationary cutting edge 46 and a movably mounted cutting edge 47, the switching pin 27 being connected to the cutting edge 47, the switching pin 27 corresponding to the switching post 43 arranged on the first control element 41 when the carrier device 19 is mounted and ensuring that the yarn end resting between the cutting edges 46, 47 of the yarn cutting device 36 is cut to an optimum and thus shorter length.

The yarn clamping device 37, which is fixed to the support surface 48 of the carrying device 19, has a stationary clamping jaw 49 and a movably mounted clamping jaw 50, the movably mounted clamping jaw 50 being equipped with the switching pin 40.

When the carrier device 19 has been mounted, the switching pin 40 acts via a switching column 44 arranged on the first control element 41, with the result that the yarn end resting between the clamping

jaws

49, 50 is always reliably fixed.

Fig. 4 shows an alternative embodiment of the above-described bend-carrying means 19.

As can be seen, the support device 19 is not designed as an angled element 54, but as a circular segment 53. The circular section 53 has a punched first support surface section 34 and a punched second support surface section 48, the punched first support surface section 34 having a first support point 34a and the punched second support surface section 48 having a second support point 48a, which serve in a corresponding association for holding the yarn cutting device 36 and the yarn clamping device 37. The two

support surface segments

34 and 48 of the circular segment 53 are also arranged at an angle a to each other, the angle a being selected in the range of 110 ° to 160 °, preferably in the range of 120 ° to 130 °.

In the case of a workstation with a forwardly open yarn path, the function of the yarn splicing device according to the preferred embodiment is:

as is known per se and therefore not explained in more detail, by the clearer continuously monitoring the advancing yarn on the work station 2 of the automatic winder 1 during the winding operation, the clearer detects any yarn irregularities and reports them to the work station computer 29.

The workstation computer 29 immediately initiates a defined clearer cut, if necessary, in which the advancing yarn is cut into an upper yarn 31 and a lower yarn 32 by yarn cutting devices arranged in the region of the clearer.

The upper thread 31 then runs onto the surface of the cross-wound bobbin 15, the cross-wound bobbin 15 being held rotatably in a creel and loaded with a braking torque, while the lower thread 32 is usually held in a so-called thread tensioner.

In order to remove defective thread parts and create a new thread connection, the thread end of the upper thread 31 which has already advanced onto the cross-wound bobbin 15 is subsequently received again. That is, the suction nozzle 12 is pivoted upward and the opening with which the underpressure can be applied is positioned in the region of the surface of the cross-wound bobbin 15, the cross-wound bobbin 15 simultaneously rotating slowly in the unwinding direction.

Once the suction mouth 12 has received the yarn end of the upper yarn 31, the defective yarn piece is cut off and removed by means of a yarn cutting device (not shown) arranged in the region of the suction mouth 12.

The thread end of the upper thread 31, which is now free of defects, is then guided through the suction mouth 12 into the splicing channel 35 of the splicing prism 23 of the thread splicing device 10, and the upper thread 31, which is guided by the separating or thread guide plate, is additionally guided between the clamping

jaws

49, 50 of the upper thread clamping device 37B fixed to the carrier device 19 and between the cutting edges 46, 47 of the lower thread cutting device 36A fixed to the other carrier device 19.

At the same time as or slightly offset in time from the yarn end receiving the upper yarn 31, the yarn end of the lower yarn 32 is also received. That is, the yarn end of the lower yarn 32, which is generally fixed in the yarn tensioner after controlled yarn cutting, is collected by the clamping tube 25 and the lower yarn 32 is likewise inserted into the splicing channel 35 of the splicing prism 23 of the yarn splicing device 10. The lower thread 32 is also guided between the clamping

jaws

49, 50 of the lower thread clamping device 37A and between the cutting edges 46, 47 of the upper thread cutting device 36B, wherein the lower thread clamping device 37A and the upper thread cutting device 36B are likewise mounted on the carrier device 19.

Once the upper yarn 31 and the lower yarn 32 are inserted into the splicing channel 35 of the splicing prism 23, the upper yarn 31 and the lower yarn 32 are mechanically fixed by

yarn clamping devices

37A, 37B and properly cut to length by

yarn cutting devices

36A, 36B. This means that the workstation computer 29 ensures that the stepper motor 39 acts via the pinion 45A on the toothed section 51 of the first control element 41, so that the first control section 41 rotates slightly in the direction R. In the case of this rotary movement of the first control element 41, the first and

second switching columns

43, 44 also move and actuate the

yarn clamping devices

37A, 37B and the

yarn cutting devices

36A, 36B.

Compressed air is then applied to the small opening-holding tube 17 by means of suitable valve control, and the free yarn ends of the upper yarn 31 and the lower yarn 32 are thereby sucked into the small opening-holding tube 17. The compressed air flowing into the annular channel holding the opening tubulet 17 via the tangential bore then ensures that the yarn ends are properly prepared with air pressure. That is, the yarn ends of the upper yarn 31 and the lower yarn 32 sucked into the opening holding tubule 17 are largely released from their yarn twists and short fibers.

The appropriately prepared yarn ends of the upper yarn 31 and the lower yarn 32 are then pulled out of the holding opening tubule 17 by the yarn feeder 38 and positioned in the splicing channel 35 of the splicing prism 23 such that the yarn ends have an opposite orientation and a specifiable overlap. That is, the workstation computer 29 controls the stepper motor 40 such that the second control segment 42 rotates slightly in direction a. In the case of this rotational movement, the arms of the yarn feeder 38 cross the yarn strands of the upper yarn 31 and the lower yarn 32, respectively, which extend between the

yarn clamping device

37A or 37B and the splicing channel 35 of the splicing prism 23, and pull the free yarn ends from the opening holding tubule 17.

The yarn ends of the upper yarn 31 and the lower yarn 32, which are properly positioned in the splicing channel 35 of the splicing prism 23, are then pneumatically joined. This means that the workstation computer 29 controls, for example, solenoid valves, such that splicing air is blown into the splicing channel 35, which winds the otherwise largely parallel fibers of the two yarn ends together and produces a yarn splice in which the yarns are almost identical.

The yarn joining process is thus ended and the yarn that has been separated is repaired. The relevant station 2 can continue the original rewinding process.

Claims

1. A yarn splicing device (10) for textile machines (1), having:

a spliced prism (23) comprising a splicing channel (35), air pressure being applicable to the splicing channel (35), and

a yarn processing device (36, 37) arranged at a distance from the splicing prism (23), the yarn processing device (36, 37) comprising a respective yarn clamping device (37A; 37B) for fixing an upper yarn (31) or a lower yarn (32) and a respective yarn cutting device (36A; 36B) for cutting a yarn end of the upper yarn (31) or the lower yarn (32) to a length,

it is characterized in that the preparation method is characterized in that,

the yarn splicing device (10) is designed as a rotary splicer with at least one control element (41), the control element (41) being capable of suitably controlling the yarn handling devices (36, 37), a carrying device being arranged on each of the two sides of the splicing channel (35), the carrying device (19) having a first support point (34a) for fixing one of the yarn cutting devices (36A, 36B), the first support point (34a) being arranged between the opening of the splicing channel (35) and the outer edge (26A) of a support element (26), the support element (26) surrounding the control element (41) and the splicing prism (23), and/or

The carrier device (19) is designed as a corner section (54) or a round section (53) having a first support surface section (34) and a second support surface section (48), the first support surface section (34) comprising a first support point (34a) for fixing the yarn cutting device (36A; 36B), the second support surface section (48) comprising a second support point (48a) for fixing the yarn clamping device (37A; 37B), the first support surface section (34) being set at an angle to the second support surface section (48).

2. Yarn splicing device (10) according to claim 1, wherein the first support surface section (34) having the first support point (34a) is set at an angle a with respect to the second support surface section (48) having the second support point (48a), said angle a being selected in the range of 110 ° to 160 °.

3. Yarn splicing device (10) according to claim 1 or 2, wherein the carrier device (19) is formed by a stamped element and the first support surface section (34) and the second support surface section (48) are formed by stamped areas.

4. Yarn splicing device (10) according to claim 1 or 2, wherein a yarn cutting device (36A; 36B) is mounted on the first support surface section (34) at the first support point (34a) and a yarn clamping device (37A; 37B) is mounted on the second support surface section (48) at the second support point (48 a).

5. Yarn splicing device (10) according to claim 4, characterised in that the yarn cutting device (36A; 36B) has a stationary cutting edge (46) and a movably mounted cutting edge (47), to which movably mounted cutting edge (47) a switching pin (27) is connected, which switching pin (27) can be acted on by a switching stud (43) of the control element (41).

6. Yarn splicing device (10) according to claim 5, characterised in that the yarn clamping device (37A; 37B) has a stationary clamping jaw (49) for fixing the yarn and a movably mounted clamping jaw (50), the movably mounted clamping jaw (50) being equipped with a further switching pin (30), the further switching pin (30) being able to act via a second switching column (44) of the control element (41).